This document was created by Alex Yartsev ([email protected]); if I have used your data or images and forgot to reference you, please email me. Fascia and compartments around the cubital fossa and distal forearm Section at the level of the neck of radius Median cubital vein Basilic vein Antebrachial Fascia Cephalic vein - Extension of the brachial fascia - Also envelops the forearm like a sleeve - There are no “intermuscular” septa per se; the muscles are all invested in their own fascia; however there are still two recogniseable compartments: the FLEXOR compartment and the EXTENSOR compartment. In 20% of people, the basilic vein branches off into a “median basilic” vein, and when it joins the median cephalic vein they form a clear “M”. THERE ARE 17 MUSCLES CROSSING THE ELBOW JOINT.

Basilic vein Cephalic vein Median antebrachial vein Highly variable tributaries The BICEPS TENDON: one part blends with the antebrachial fascia; Brachial artery which bifurcates at the level The other part dives deep to attach to the radial tuberosity of the radial head in the cubital fossa Brachialis Pronator teres which originates proximally to Brachioradialis the medial epicondyle, and forms the medial border Which forms the lateral of the cubital fossa border of the cubital fossa The Flexors of the forearm which originate at the Common Flexor origin, at the medial The branches of the Radial Nerve epicondyle of the humerus

Superficial branch of the BrR radial nerve which travels under brachioradialis down the arm, where it supplies sensation to the dorsum of the hand ECRL, B ED Deep branch of the Radial Nerve which will pierce the Supinator, penetrate the interosseous membrane and become the Posterior Interosseous Nerve Radial artery Daughters of the recently Biceps tendon Ulnar artery bifurcated Brachial Artery

Median nerve which travels between the heads of P. teres Brachioradialis Pronator Teres

Flexor Digitorum Superficialis (humeral head) Extensor Carpi Radialis Longus and Brevis Brachialis Flexor Carpi Radialis

Neck of Palmaris Longus Radius ULNA Flexor Carpi Ulnaris which is fully innervated by the ulnar nerve, unlike the Extensor Digitorum rest of the flexors

Ulnar nerve, which runs between the two Annular Ligament heads of flexor carpii ulnaris

Anconeus Flexor Digitorum Profundis Half of which is innervated by the ulnar nerve, unlike the rest of the flexors (which are all supplied by the Median nerve)

COMPARTMENTS IN THIS SECTION are not clear-cut or sensible. - This is an intersection of several compartments. The EXTENSOR compartment of the forearm is anterolateral, represented by brachioradialis, extensor carpi radialis longus and brevis, and extensor digitorum. The FLEXOR compartment is posteromedial and represented by pronator teres, palmaris longus, flexor carpi ulnaris, and flexor digitorum profundus and superficialis. The ANTERIOR compartment of the arm is represented by the biceps tendon, and by brachialis. - Anconeus is a lonely representative of the POSTERIOR compartment.